We rely on evidence to help us make the best clinical decisions. What happens when the evidence we rely on isn't so reliable? Dr. Elia Abi-Jaoude, a psychiatrist at SickKids Hospital in Toronto is one of a group of international clinicians and researchers that have taken on the task to re-review the accepted evidence that has gone into assumptions made in psychiatry. He shares examples of how evidence is used and sometimes misused in health care.